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  <h3>
    e965.  
    Listening for Column-Related Changes in a JTable Component</h3>

Events are fired whenever a column is added, removed, resized, 
and moved.


<pre>
    
<font color="#0066ff"><i>table</i></font>.getColumnModel().addColumnModelListener(
        new MyTableColumnModelListener(table));
    
    public class MyTableColumnModelListener implements TableColumnModelListener {
        JTable table;
    
        // It is necessary to keep the table since it is not possible
        // to determine the table from the event's source
        public MyTableColumnModelListener(JTable table) {
            this.table = table;
        }
    
        public void columnAdded(TableColumnModelEvent e) {
            int fromIndex = e.getFromIndex();
            int toIndex = e.getToIndex();
            // fromIndex and toIndex identify the range of added columns
        }
    
        public void columnRemoved(TableColumnModelEvent e) {
            int fromIndex = e.getFromIndex();
            int toIndex = e.getToIndex();
            // fromIndex and toIndex identify the range of removed columns
        }
    
        public void columnMoved(TableColumnModelEvent e) {
            int fromIndex = e.getFromIndex();
            int toIndex = e.getToIndex();
            // fromIndex and toIndex identify the range of columns
            // being moved. In the case of a user dragging a column,
            // this event is fired as the column is being dragged
            // to its new position. Also, if the column displaces
            // another during dragging, the fromIndex and toIndex
            // show its new position; this new position is only
            // temporary until the user stops dragging the column.
        }
    
        public void columnMarginChanged(ChangeEvent e) {
            // The width of some column has changed.
            // The event does not identify which column.
        }
    
        public void columnSelectionChanged(ListSelectionEvent e) {
            // See <a href="../javax.swing.table/SelEvent.html" class="eglink"><font size="-1"><b>e963</b> Listening for Selection Events in a JTable Component</font></a>
        }
    }
</pre>
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            &nbsp;Related Examples
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e963. <a class="eglink" href="SelEvent.html?l=rel">
    Listening for Selection Events in a JTable Component
</a>
<br>

e964. <a class="eglink" href="ValueEvent.html?l=rel">
    Listening for Changes to the Rows and Columns of a JTable Component
</a>
<br>

e966. <a class="eglink" href="ColHeadEvent.html?l=rel">
    Listening for Clicks on a Column Header in a JTable Component
</a>
<br>


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        See also: 
<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Cells">
    Cells
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Column%20Heads">
    Column Heads
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Columns">
    Columns
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Editing">
    Editing
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Layout">
    Layout
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Rows">
    Rows
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Scrolling">
    Scrolling
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Selection">
    Selection
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Sorting">
    Sorting
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Table%20Model">
    Table Model
</a>&nbsp;&nbsp;

<a class="eglink" href="/egs/javax.swing.table/pkg.html?l=rel#Tool%20Tips">
    Tool Tips
</a>&nbsp;&nbsp;

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